hand Definition and 450 Threads

I suppose this is an unusual request (based on the lack of relevant results when I searched for it). As I'm largely self taught I find myself in a position where I have never seen many symbols I'm familiar with written by hand (vs in print or on a computer). Since there are subtle differences...

Hi everybody, thank you in advance for all comments/help. First off, I know I am new here, but a friend of mine is a casual on this board and he suggested I try it for help. I have just begun a 2nd year university introductory to mechanics class, and I have an assignment due tomorrow. I...

I'm currently trying to reassess my image of the BB and the universe in general. I've been led to believe/understand that at the moment after the creation event the universe would fit millions of times within the space occupied by a single subatomic particle. However there's something wrong...

Hello, I want to use a DC permanent motor as a generator in order to use it to charge a battery. This generator will be rotated by hand. The speed is varying as it rotates by hand. I would like to know what is the circuit that I could use it to charge 12 V chargeable batter? Best wishes,

Does a left hand thread offer any advantages over a right hand thread?

Current Electricity -- current flowing through hand Homework Statement i)For a layer dry skin 1mm thick, determine the resistance of a 1 cm^2 area of skin. Resistivity of dry skin : 3 x 10^4 ohms m [3.0 x 10^5 ohms ] ii)A person, who is well-earthed, accidentally grabs a wire of...

This question is not about how to calculate the logarithm, but rather what method would be expected of someone in 1969. I am going through Apostol's Calculus, and in section 6.10 Apostol introduces polynomial approximations to the natural logarithm. Specifically, he introduces the following...

Hello everyone. I want to purchase an RFID reader and they asked me if I wanted a left hand or right hand circular polarized reader. I have no clue what this means. Could anyone please help me understand this? I saw some website and all I understood was that the signal travels either clockwise...

can someone explain the application of the right hand rule? I'm totally lost. i'd like to understand how it's used

A student gets a 3 kg mass to oscillate up and down on bottom of a light vertical spring by pulling her hand up and down on the top end of the spring. The spring is a real spring with a spring constant of 94 N/m and a damping constant of 0.6 N sec/m. (a) At what approximate frequency should...

How would you plot the magnitude and phase Bode plots for the system transfer function of (4s^3+40s^2)/(4s^4+405s^3+504s^2+400s) I plugged it into MATLAB and got a result but my professor wants hand calculations. Thanks

In the image attached, you can see a hand operated plunger for making String hoppers. The handle is rotated and the screw descends and plunges into to canister containing the batter. To mechanize this process, one can use a linear actuator, but the catch is estimating the linear force...

Simple question: Is there a reason behind the right hand grip rule, or is it just like that (inexplicable)? How do we know that for an object with counter-clockwise rotation (e.g. on the table), the angular velocity is upwards?

When do I resort to using a CAS to solve an equation? Is this one possible by hand? I got this from a 2 dimensional GPS problem. Here's the math using the distance formula. L12 = (x1- x)2 + (y1- y)2 L22 = (x2- x)2 + (y2- y)2 I tried the substitution method but it gets nasty and I...

Homework Statement A length of wire extends upward through a piece of cardboard, bends around, forming a loop, and extends back down through the cardboard. All that is visible above the surface of the cardboard is this loop of wire. From your perspective, you are looking downward on the piece...

Homework Statement #30 Homework Equations right hand rule #2 The Attempt at a Solution when i did it, i pointed my thumb to the right, because the current is going to the right. and when i wrapped my hands around the wire until i reach the electron, i go the magnetic force going...

Homework Statement I am having trouble understanding right hand rule for Lenz's Law. I need to know how to use the right hand rule with lenz'z law to find the dircection of induced current. What if a current is flowing clockwise, with mag. field going into page, is the magnetic field...

I'm reviewing for a test. One of my questions on the review (and incidentally a question I've had in my own mind for a long time) is how do you evaluate an ARBITRARY rational exponent with pencil and paper and no calculator? The specific problem i was givens is "Solve without a calculator...

[b]1. First one is (sin2x+sinx)/(cos2x+cosx+1)=tanx Second one is (sec∂-tan∂)²=(1-sin∂)/(1+sin∂) [b]2. Sec=1/cos tan=sin/cos cos²x+sin²x=1 [b]3. 1. I think eventually the sinx/cosx need to cancel to make tanx and the 1 could be used to create a lot of options 2. I have tried to...

Homework Statement A strong magnet is placed under a horizontal conducting ring of radius r that carries current I as shown in the figure below. The magnetic field makes an angle θ with the vertical at the ring's location. (b) What is the direction of the resultant magnetic force on...

I am having trouble understanding how the right hand rule works with lenz's law. Please explain

I am having a hard time understanding how come the right hand rule will tell you the direction of a vector that is perpendicular to other two vectors. I mean, I've seen some examples of a current flowing through a wire, which created a magnetic field around it, if there is a positive particle...

this might not be the right place but i had to skim some wiki articles that had a lot of organic chemistry in them so that's why i chose it. i want to make hand sanitizer. ideally lots of it, cheaply and simply. this of course led me to research how isopropanol is made (by steam cracking...

I am having difficulty using the right hand rule to explain a natural phenomenon. Here's my concern: I know that incomming charged particles from the sun are deflected by the Earth's magnetic field because charged particles moving through a magnetic field experience a magnetic force. Here's a...

I filled out some of my reu applications by hand rather than typing them up on the computer. My parents don't think this is acceptable. What do you guys think?

I read about a type of identification system in which a person's hand is stamped with some sort of ink or substance that is invisible to the naked eye. This normally invisible stamp on the human hand is visible under an infrared light. I remember that an infrared camera sees things that give...

Homework Statement A wire carries a current from left to right, thru a magnetic field which has direction towards you. What is direction of magnetic force on the wire, draw diagram. Homework Equations The Attempt at a Solution I not sure how to do the right hand rule in this...

I trying to learn extended kalman filter. I am trying to simulate positions of point by angle mearsurments taken by an observer moving on a straight line. The EKF implementation does not converge. Below the MATLAB script clear all; close all; clc; %Generate staright line positions T=300...

Homework Statement A well shuffled deck has 4 black cards and 12 red cards (16 total). The cards are dealt out to 4 players (each gets 4 cards). What is the probability that each player will have 1 black card?Homework Equations Asking how to set this up and solve this. The Attempt at a...

I've read that when washing one's hands, the primary mechanism by which the hands become clean is mechanical. That is, organisms are removed from your hands by rubbing and rinsing. But I believe that soap itself does have some antimicrobial action. I assume that glycerin soap and regular...

So I am taking an intro to programming class and am doing pretty well. I am getting high 90s on all assignments and end up helping others during lab time (used to practice programming). However, on our last exam I got a B on the test (about average). Not too bad, but I know I can do better. Now...

Homework Statement A standard deck of playing cards has all the red (heart, diamond) cards removed. Find the probability of obtaining a 2 pair when 5 cards are dealt. Homework Equations The combination formula: \dbinom{n}{k} = \dfrac{n!}{k!(n-k)!} The Attempt at a Solution...

I know that in a second it is 1/60 Hz. In a minute it is 1/3600 Hz. How do I express it in hour hand? I am a little confused.

I have just learned about an interesting cultural difference. On which hand/finger do you wear your wedding ring?

Hi, I am wondering if anyone here has heard of or can explain this variation of the right hand rule: Most websites i see tells you to point thumb in direction of current and curl the fingers, and the direction of the magnetic field is the direction you're curling. But my professor uses a weird...

I'm currently doing a testing on hand pump from 2 different brand. Let's say Brand A and brand B. Brand A hand pump is 20cc/cycle with maximum pressure 350 bar, Brand B hand pump is 25cc/cycle with maximum pressure 350bar as well. 1. brand A hand pump easily pump up to 92bar, but after i tried...

Homework Statement You place a book flat on a table and press down on it with your right hand. The hand-to-book and table-to-book coefficients of kinetic friction are 0.50 and 0.45 respectively. The book's mass is 0.98 kg and your downward push on it is 9.30 N. Now, you use your left hand to...

1. (a)The speed of the tip of the minute hand on a town clock is 0.00136 m/s. What is the speed of the tip of the second hand of the same length? Answer in units of m/s. (b)What is the centripetal acceleration of the tip of the second hand? Answer in units of m/s2. Homework...

Homework Statement Proove the statement using the \epsilon and \delta definition of a limit. The limit of x as it approaches 9 from the left side of the x-axis is \sqrt[4]{9-x}=0 Homework Equations The limit of x as it approaches a from the left side of the x-axis is f(x) = L...

Just wondering, is there an equation for the force exerted on a charged particle moving perpendicularly through a magnetic field?

Homework Statement It is part of a question, i am not sure how to use RHR to find direction. http://img220.imageshack.us/img220/2594/rhr.jpg Uploaded with ImageShack.us I need to find direction of torque by using right hand rule with the Force vector and R vector ( pointing away from pivot...

Homework Statement I'm so confused about how to use the right hand rule..there are so many different sources telling me different things...like i need to use the RHR to like find the direction of the magnetic field using the current (and nothing else)..like i followed my book, and they said to...

are both right hand palm rule and right hand clasp rule different? or are they same/

I am redesigning a bicycle wheel quick release lever for a design project. I am trying to put together a force diagram as part of the project and I need to know the average force someones hand could apply to the tip of the lever to calculate the force exerted on the locking mechanism. Could...

Hey dolls and guys, do you have any good sites to buy cheap college texts second hand on? I was lucky enough to get the two volume Introduction to Calculus and Analysis by Courant/ Fritz for 17 dollars second hand and, wait for it, Boyce/DiPrima 6th edition Differential Equations and Boundary...

Hi was hoping someone out there could help me out with this problem. http://en.wikipedia.org/wiki/Poker_probability I have looked over the poker probability wiki page, but I cannot figure out this homework problem: "What is the probability that the hand dealt contains exactly two...

how does the Right hand rule work for electrons? The book only explains it for protons!

I don't get the right hand rule that apply to rotational dynamics. How could I use to solve a torque problem and how to know when its positive and what is negative.

Homework Statement The Gaussian Elimination with Partial Pivoting algorithm when applied to the following matrix A[-3 0 4; 5 2 -6; 0 0 1] Will construct matrices P, L, and U 1- What are the defining properties of the matrices P, L and U? 2- What relation do P, L, U and A always satisfy...

I've been a hand percussionist for quite a few years now. My favorite instruments are the djembe, darbuka/doumbek, and udu. I own two authentic hand-made djembes, one darbuka, and one udu. Both of my djembes are made of hare' wood and have goatskin heads. I've learned many West African and...